Moxa EDS-305-M-ST [12/16] Attention

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100BaseFX Ethernet Port Connection

The concept behind the SC/ST port and cable is quite straightforward.

Suppose you are connecting devices I and II. Contrary to electrical signals,

optical signals do not require a circuit in order to transmit data.

Consequently, one of the optical lines is used to transmit data from device

I to device II, and the other optical line is used transmit data from device

II to device I, for full-duplex transmission.

All you need to remember is to connect the Tx (transmit) port of device I

to the Rx (receive) port of device II, and the Rx (receive) port of device I

to the Tx (transmit) port of device II. If you make your own cable, we

suggest labeling the two sides of the same line with the same letter

(A-to-A and B-to-B, as shown below, or A1-to-A2 and B1-to-B2).

SC-Port Pinouts

SC-Port to SC-Port Cable Wiring

ST-Port Pinouts

ST-Port to ST-Port Cable Wiring

ATTENTION

This is a Class 1 Laser/LED product. To avoid causing serious

damage to your eyes, do not stare directly into the Laser Beam.

Redundant Power Inputs

Both power inputs can be connected simultaneously to live DC power

sources. If one power source fails, the other live source acts as a backup,

and automatically supplies all of the EDS’s power needs.

Alarm Contact

The Moxa EtherDevice Switch has one Alarm Contact located on the top

panel. For detailed instructions on how to connect the Alarm Contact

power wires to the two middle contacts of the 6-contact terminal block

connector, see the Wiring the Alarm Contact section on page 8. A typical

scenario would be to connect the Fault circuit to a warning light located in

the control room. The light can be set up to switch on when a fault is

detected.